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| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2012-10-25 13:44:12 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-11 09:06:57 -0800 |
| commit | 363cfe8903364aed741cc5c7f31610581a135be8 (patch) | |
| tree | e7cf152bdc9b0e2765cc495faa7ed6535791be10 | |
| parent | 9044dea3b603b7f0246aa7bed4039df3666fc611 (diff) | |
| download | lwn-363cfe8903364aed741cc5c7f31610581a135be8.tar.gz lwn-363cfe8903364aed741cc5c7f31610581a135be8.zip | |
xhci: Fix conditional check in bandwidth calculation.
commit 392a07ae3316f2b90b39ce41e66d6f6b5c95de90 upstream.
David reports that at drivers/usb/host/xhci.c:2257:
static bool xhci_is_sync_in_ep(unsigned int ep_type)
{
return (ep_type == ISOC_IN_EP || ep_type != INT_IN_EP);
}
The static analyser cppcheck says
[linux-3.7-rc2/drivers/usb/host/xhci.c:2257]: (style) Redundant condition: If ep_type == 5, the comparison ep_type != 7 is always true.
Maybe the original programmer intention was something like
static bool xhci_is_sync_in_ep(unsigned int ep_type)
{
return (ep_type == ISOC_IN_EP || ep_type == INT_IN_EP);
}
Fix this.
This patch should be backported to stable kernels as old as 3.2, that
contain the commit 2b69899934c63b7b9432568584fb4c4a2924f40c "xhci: USB
3.0 BW checking."
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/host/xhci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index e52ddfe05486..1722e218ee27 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -2253,7 +2253,7 @@ static bool xhci_is_async_ep(unsigned int ep_type) static bool xhci_is_sync_in_ep(unsigned int ep_type) { - return (ep_type == ISOC_IN_EP || ep_type != INT_IN_EP); + return (ep_type == ISOC_IN_EP || ep_type == INT_IN_EP); } static unsigned int xhci_get_ss_bw_consumed(struct xhci_bw_info *ep_bw) |